Question

On this line are several trains transporting passengers from staion(No. 1 ) till the end station( No. 24),then each train will continue the journey from side to side(both sides are connected together at each end).I noticed that after each 4 Minutes a train arrives this station from left side toward the right side,one minute later another train arrives the station but to the opposit direction,and so on.

If each train stays in each station exactly one minute( notice that the train at each end will make a curve and return back to that staion,just like a circle).

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Sorry can you explain how train at 1 gets to 7 in 6 minutes if it takes 1 minute between stations and stops for 1 minute at each. By my workings that must be 6 minutes moving and 6 minutes stationery which is 12 not 6!

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I am at station number 12, there is a train which will stay one minute then will move to the right.

as it moves,all the trains will move at the same time,like this:

from left to right,2,8,14,20

from right to left,23,17,11,5

after another movement:

3,9,15,21

22,16,10,4

and so on...after 4 minutes,the train that was at 7 will reach 12 from left side,the next train which was at 18 will reach 12 from the right side( after 5 min.).

You stated in post #24 that the time between 2 stations is 1 minute and yet claim that a train and also stated that time in each station is 1 minute. This would mean that the train that just arrived at 7, must stay 1 minute and spend 1 minute moving before reaching station 8. Continuing this thought means that the train at seven cannot reach 12 in less than 10 minutes because there are 5, gaps between stations, 1 minute each, and 5 stops of 1 minute at stations 7,8,9,10 & 11. I agree with Trainspotterx that you have a major problem with your solution of 8 trains.